That's exactly what my mate who got abducted by a UFO and given a tour of the solar system said.

The default piss take mode, and besides, maybe he was.

Not at all. It's a genuine example, illustrating why things that people say can't simply be taken as "facts". Until proven, they are opinions, beliefs or suppositions. Yes, maybe he was given a tour of the solar system. But the key word there is "maybe".